<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>表单修饰符</title>
	</head>
	<body>
		<div id="app">
			<!-- number 将字符转化为数值 -->
			数字1: <input type="text" v-model.number="num1"/><br>
			数字2: <input type="text" v-model.number="num2"/><br>
			<button @click="addNum">加法</button> <br>
			总数: {{count}}
			<hr >
			<!-- 去除多余的空格 -->
			数据: <input type="text" v-model.trim="msg"/> <br>
			字符长度 {{msg.length}}
			<hr />
			<!-- lazy 当数据失去焦点时触发事件 -->
			检验用户名: <input type="text" v-model.lazy="username"><br>
			{{username}}
		</div>
		<script src="../js/vue.js"></script>
		<script>
			const app = new Vue({
				el: "#app",
				data: {
					num1: '',
					num2: '',
					count: '',
					msg: '',
					username: ''
				},
				methods: {
					addNum(){
						this.count = this.num1 + this.num2
					}
				}
			})
		</script>
	</body>
</html>
